The equation for line s can be written as y = -8/7x - 4. Line t, which is perpendicular to line s, includes the point (10, 9). What is the equation of line t?

y=-8/7x-4

from, m1m2=-1

-8/7m2=-1

m2=7/8

again from, m=(y-y1)/(x-x1)

7/8=(y-9)/(x-10)

8(y-9)=7(x-10)

8y-72=7x-70

8y=7x-70+72

8y=7x+2

therefere,

y=7/8x+1/4

7 weeks

step-by-step explanation:

convert each fraction to the least common multiple of 20, so 3/4 = 15/20 & 1/10 = 2/20, then divide 15 by 2 and you get a little over 7, so the food will last 7 weeks.